#3971F8
Closest named color: Clear Blue (#247AFD). oklch(59% 0.211 264), rgb(57, 113, 248).
Aa
Black text reads best on this color (4.89:1).
About this color
#3971F8 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.211 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.023 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.211) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #3971F8 |
| RGB | rgb(57, 113, 248) |
| HSL | hsl(222, 93%, 60%) |
| OKLCH | oklch(59% 0.211 264) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3971F8 | 4.29:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #3971F8 | 4.89:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #3971F8 text on white | 4.29:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #3971F8 text on black | 4.89:1 | AA | Lc -32.5 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8DAFD
oklch(88.6% 0.052 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4B81FD
oklch(63.2% 0.194 264)
-
Step 600
600 (this color)
#3971F8
oklch(59% 0.211 264)
-
Step 700
700
#2354CD
oklch(49.1% 0.195 263.9)
-
Step 800
800
#1E45A6
oklch(42.6% 0.163 264)
-
Step 900
900
#1D3C84
oklch(37.8% 0.127 263.8)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#3971F8 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #0083FD | 0.045 |
| Deuteranopia (no green cones) | #0072F5 | 0.025 |
| Tritanopia (no blue cones) | #0092AA | 0.164 |
| Achromatopsia (no color) | #7A7A7A | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3971F8
#3971F8
oklch(59% 0.211 264)
- #9F7600
#9F7600
oklch(59.1% 0.121 84.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3971F8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.023
- Cerulean Blue #056EEE ΔE 0.032
- Royal Blue #4169E1 ΔE 0.038
- Neon Blue #4361EE ΔE 0.039
- Bright Blue #0165FC ΔE 0.043
- Azul #1D5DEC ΔE 0.058
- Cornflower #6A79F7 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.072
Use #3971F8 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.